# Deno Core This Rust crate contains the essential V8 bindings for Deno's command-line interface (Deno CLI). The main abstraction here is the Isolate which provides a way to execute JavaScript. The Isolate is modeled as a `Future` which completes once all of its ops have completed. In order to bind Rust functions into JavaScript, use the `Deno.core.dispatch()` function to trigger the "dispatch" callback in Rust. The user is responsible for encoding both the request and response into a Uint8Array. Documentation for this crate is thin at the moment. Please see [http_bench.rs](https://github.com/denoland/deno/blob/master/core/examples/http_bench.rs) as a simple example of usage. TypeScript support and a lot of other functionality is not available at this layer. See the [cli](https://github.com/denoland/deno/tree/master/cli) for that.